2.2.4 Practice Questions

2.2.4 Practice Questions Score:100% Question1:Which of the following are characteristics of coaxial network cable? (Select three.) CorrectAnswer: Theendsofthecablemustbeterminated. Incorrect Answer: It uses RJ45 connectors. Incorrect Answer: cross-talk. The conductors within the cable are twisted around each other to eliminate Incorrect Answer: conduct light signals. It uses two concentric conductors that are made from plastic or glass and CorrectAnswer: Ithasaconductormadefromcopperinthecenterofthecable. Incorrect Answer: It is composed of four pairs of 22-gauge copper wire. CorrectAnswer: Itusestwoconcentricmetallicconductors. EXPLANATI ON Coaxial cable is composed of a central copper conductor surrounded by an insulator, which is then surrounded by a second metallic mesh conductor. The name coaxial is derived from the fact that both of these conductors share a common axis. Both ends of a coaxial cable must be terminated. Question2:Which of the following cables offers the best protection against EMI? Incorrect Answer: Cat 5e Incorrect Answer: Cat 6a Incorrect Answer: Cat 5 CorrectAnswer: RG-6 EXPLANATI ON Coaxial cable offers better protection against EMI than twisted pair cables. Coaxial cable has a mesh conductor, which provides a ground and protects against EMI. In general, the higher the twisted pair cable standard, the better protection against some forms of EMI (typically crosstalk). For twisted pair, use shielded twisted pair instead of unshielded twisted pair. Use fiber optic for the best protection against EMI. Question3:You have just signed up for a broadband home internet service that uses coaxial cable. Which connector type will you most likely use? Incorrect Answer: Incorrect Answer: Correct Answer: RJ45 ST F-type Incorrect Answer: BNC Incorrect Answer: SC Incorrect Answer: RJ11 EXPLANATI ON Use an F-type connector for broadband cable connections that use coaxial cable. Use a BNC connector for 10Base2 Ethernet networks. Use an RJ11 connector for modem connections to a phone line. Use an RJ45 connector for an Ethernet network that uses twisted pair cable. Use ST and SC connectors for fiber optic cables. Question4:F-type connectors are typically used with which of the following cable standards? (Select two.) CorrectAnswer: RG-59 Incorrect Answer: RG-58 CorrectAnswer: RG-6 Incorrect Answer: Cat 5e Incorrect Answer: Cat 5 Incorrect Answer: Cat 6a EXPLANATI ON F-type connectors are used with coaxial cable. They are typically used for cable TV and satellite installations using RG-6 or RG-59 cables. RG-58 cables typically use BNC connectors and cables are used for 10Base2 Ethernet. Cat 5, 5e, and 6a cables use RJ45 connectors. Question5:You are working with an older 10Base2 Ethernet network. Which of the following connector types will you most likely encounter? Incorrect Answer: RJ11 Incorrect Answer: F-Type CorrectAnswer: BNC Incorrect Answer: ST EXPLANATI ON A 10Base2 Ethernet network (also called a Thinnet) is an older type of network that uses coaxial cables with BNC connectors for communication. F-type connectors are used for cable and satellite TV connections as well as broadband cable connections. RJ11 connectors are typically used for dial-up and DSL connections. ST connectors are used with fiber optic cables. Question6:You have a small home network connected to the internet using an RG-6 cable. You need to move the router connecting the network to the internet, but can't find any RG-6 cable. Which cable types could you use instead? CorrectAnswer: RG-59 Incorrect Answer: Cat 5e Incorrect Answer: Cat 3 Incorrect Answer: RG-58 EXPLANATI ON RG-6 has an impedance rating of 75 ohms. It is important to use coaxial cables with the same impedance rating. Only RG-59 is rated for 75 ohms. Connecting coaxial cables with Cat 3 and Cat5e cables requires a media converter.